You have the heater but no cord most likely. Youll have to go buy one. Unless it is ordered with the cord. Also not a bad idea to snug up the block heater a little. There was a thread a few months ago about the heaters being not much more than hand tight in the block. I can't remember what size of wrench it uses. something around an 1-1/8????. Go to a local truck dealer[heavy truck] and pick up a cord.